Hello,

If there are was any fixed number of time prescribed upon which one can ace Biology in NEET then everyone would have secured full marks in Biology in NEET. Having said that, you need to revise the chapters until you feel confident that you have covered enough to secure good marks.You should feel the confidence while solving the test series.And until you are making mistakes in the test, you have to keep doing the revision.Focus more on the chapters you are making mistakes and revise them multiple times.

I hope this helps.